President Donald Trump said Monday that the conflict with Iran is largely complete after a series of U.S. strikes targeted the country’s leadership and military capabilities during Operation Epic Fury. Speaking in a telephone interview with CBS News, Trump said the campaign has significantly weakened Iran and could soon bring the conflict to an end.

“I think the war is very complete, pretty much,” Trump said. “They have no navy, no communications, they've got no air force.” He added that the operation has progressed much faster than expected, noting the United States is “very far” ahead of the four-to-six-week timeline he initially projected.

The United States launched the operation on Feb. 28 in coordination with Israel. During the opening phase of the attack, Iranian Supreme Leader Ayatollah Ali Khamenei was killed as U.S. forces targeted senior leadership and military infrastructure tied to the Islamic Republic.

Asked about Iran’s new leader, Mojtaba Khamenei, the son of the late supreme leader, Trump said he had no message for him. “I have no message for him. None whatsoever,” Trump said, adding that he has someone in mind to eventually replace Khamenei but did not provide further details.

Trump also addressed security concerns in the Strait of Hormuz, a critical global shipping route used by oil tankers. Iran had threatened to attack vessels passing through the strait during the conflict, but Trump said ships are continuing to move through the waterway. He added that the United States is considering further steps to secure the route, saying he is “thinking about taking it over.”

The president also issued a warning to Iran against further escalation.

“They've shot everything they have to shoot, and they better not try anything cute or it's going to be the end of that country,” Trump said.